Revert "disable gpu Subtract_Array test:"

This reverts commit e91bf95d5832e87aa70240c50f0bf7fcc587e8c8.
Revert "disable gpu CvtColor.*2HSV tests:"

This reverts commit 952027a8536215a5e4308c79a59308c6b3426354.
fix epsilons for several gpu tests
Revert "disable CUDA generalized Hough Transform"

This reverts commit 33d42b740c6fe938b63a0b25c9ad51741aba48c3.
dynamicuda module disabled in OpenCv.mk for all arches except armeabi-v7a.
fix nonfree module compilation without CUDA
Merge pull request #2300 from asmorkalov:android_no_cuda_not_armeabiv7a
Implicit testdata directory permissions setup added.
Revert "disable gpu Canny and HoughCircles perf tests:"

This reverts commit dbce90692acd84fbf46bde4da4b1726049f42857.
Merge pull request #2297 from asmorkalov:ocv_testdata_install_perms_fix
Merge pull request #2301 from jet47:fix-nonfree-build
fixed several bugs in CUDA Canny implementation:

* out of border access in edgesHysteresisLocalKernel
* incorrect usage of atomicAdd
Merge pull request #2294 from jet47:fix-gpu-issues
Merge pull request #2303 from jet47:gpu-canny-fix
decrease input size for several gpu tests to fix "timed out" error:

* BruteForceNonLocalMeans
* OpticalFlowBM
Fixed Cl.exe hang for VS2008 x64 with Eigen::exp() function
Merge pull request #2309 from Nerei:fixed_cl_exe_hang_with_eigen
Merge pull request #2308 from jet47:gpu-tests-timeout
Updated cloud io functionality - removed dependency from VTK legacy
More proper OpneCv+Qt+Vtk issues handling (http://code.opencv.org/issues/3492)